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11. 发明授权

US5349604A Semiconductor laser source 失效
标题翻译：半导体激光源
公开(公告)号：US5349604A
公开(公告)日：1994-09-20
申请号：US30863
申请日：1993-03-12
申请人： Naotaro Nakata
发明人： Naotaro Nakata
IPC分类号： G02B6/42 , H01L33/58 , H01S3/00 , H01S5/00 , H01S5/022 , H01S5/026 , H01S3/08
CPC分类号： G02B6/4204 , H01S5/005
摘要： A laser diode and a lens are fixed onto a laser fixing member. A laser beam emitted from the laser diode passes through the lens, and a part of the laser beam passes through a pinhole provided to a beam restricting plate. The pinhole is formed so that its diameter is smaller than the laser beam diameter at the beam restricting plate. The laser beam is transmitted therethrough while being diffracted.
摘要翻译：激光二极管和透镜固定在激光固定部件上。从激光二极管发射的激光束通过透镜，并且一部分激光束穿过设置在光束限制板上的针孔。针孔形成为使其直径小于束限制板处的激光束直径。激光束在被衍射的同时被透射。

12. 发明授权

US07313073B2 Optical pickup and optical disk system 有权
标题翻译：光学拾取和光盘系统
公开(公告)号：US07313073B2
公开(公告)日：2007-12-25
申请号：US10383974
申请日：2003-03-07
申请人： Naotaro Nakata
发明人： Naotaro Nakata
IPC分类号： G11B7/135 , G11B7/08 , G11B7/22
CPC分类号： G11B7/127 , G11B7/1365
摘要： An optical pickup for reading information written on an optical disk is equipped with a laser diode having a front facet which emits light, a parallel light ray portion which collimates the emitted light from the laser diode, means for focusing collimated output light onto the optical disk, means for receiving reflected light from the optical disk, and an optical element having an index of refraction of 1 or higher for adjusting the length of the optical path between the front facet of the laser diode and the optical disk, wherein the optical element is inserted in the parallel light ray portion when the optical path length lies within the range of the expression“(n−0.5±0.25)×the effective cavity length of the laser diode” (where n is a positive integer) in order to reduce the noise in the emitted light of the laser diode.
摘要翻译：用于读取写在光盘上的信息的光学拾取器配备有具有发射光的前面的激光二极管，将来自激光二极管的发射光准直的平行光线部分，用于将准直输出光聚焦到光盘上的装置用于接收来自光盘的反射光的装置和具有1或更高折射率的光学元件，用于调节激光二极管前面与光盘之间的光路长度，其中光学元件为当光程长度位于“（n-0.5±0.25）x激光二极管的有效腔长度”（其中n为正整数）的范围内时，插入平行光线部分，以减少噪声在激光二极管的发射光中。

13. 发明授权

US06677573B1 Laser sensor having a pinhole for particle measurement 有权
标题翻译：具有用于粒子测量的针孔的激光传感器
公开(公告)号：US06677573B1
公开(公告)日：2004-01-13
申请号：US09671652
申请日：2000-09-28
申请人： Naotaro Nakata , Hironori Endo
发明人： Naotaro Nakata , Hironori Endo
IPC分类号： H01J516
CPC分类号： B41J2/125
摘要： The laser sensor comprises: a laser source (1), a condenser lens (2) for converging the light from the laser source, and a pin hole plate (3) disposed adjacent to the condenser lens in the opposite side to the laser source, so that its pin hole (3a) is in the converging beam converged by the condenser lens. A light detecting portion is disposed at a converging portion of the light so as to face to the light beam passed the pin hole. The diameter of the pin hole is 0.4 to 0.7 mm. As a result, a small diameter beam having a constant diameter over a long section, which is longer than 100 mm, is obtained, so that the laser sensor can be used, irrespective to a small change of the detecting position. Further, the laser sensor allows to use a plastics lens as the condenser lens.
摘要翻译：激光传感器包括：激光源（1），用于会聚来自激光源的光的聚光透镜（2）和与激光源相反侧的聚光透镜相邻设置的针孔板（3）使得其销孔（3a）处于聚光透镜会聚的会聚光束。光检测部分设置在光的会聚部分处以面对穿过针孔的光束。针孔的直径为0.4〜0.7mm。结果，获得了比长度大于100mm的长直径的小直径梁，使得可以使用激光传感器，而不管检测位置的变化很小。此外，激光传感器允许使用塑料透镜作为聚光透镜。

14. 发明授权

US06597486B2 Semiconductor laser and optical system having a collimator lens 失效
公开(公告)号：US06597486B2
公开(公告)日：2003-07-22
申请号：US09947959
申请日：2001-09-06
申请人： Naotaro Nakata , Akihisa Yoshida
发明人： Naotaro Nakata , Akihisa Yoshida
IPC分类号： G02B2608
CPC分类号： G02B26/124 , G02B27/30
摘要： An optical system includes a semiconductor laser. The semiconductor laser is accommodated within a case. The case is formed with a window to pass through laser light emitted from the semiconductor laser. The laser light passed through the window comes to a collimator lens. Between semiconductor laser and the collimator lens is provided a light shield member having a pinhole to pass through the laser light having passed the window. Laser light made in a parallel luminous flux is outputted from the collimator lens. This laser light is deflected toward a main scanning direction by a deflector and further collected on a scanning surface by a light collector.

15. 发明授权

US5463707A Optical fiber receptacle and method of producing the same 失效
标题翻译：光纤插座及其制造方法
公开(公告)号：US5463707A
公开(公告)日：1995-10-31
申请号：US295453
申请日：1994-08-24
申请人： Naotaro Nakata , Naofumi Aoki , Kenji Okada
发明人： Naotaro Nakata , Naofumi Aoki , Kenji Okada
IPC分类号： G02B6/32 , G02B6/42
CPC分类号： G02B6/4204 , G02B6/4227 , G02B6/4222
摘要： An optical fiber receptacle has a glass rod lens in its one end side and a front end of an optical fiber to be connected to the opposite end side of the receptcle is brought into physical contact with a spherical surface of the glass rod lens to thereby make the optical fiber optically couple with an optical element to be provided on the glass rod lens side, wherein a housing including a sleeve for insertion of the front end of the optical fiber therein is fixed to a lens holder for fixedly holding the glass rod lens by fusion so that the center of the sleeve and the center of the spherical surface of the glass rod lens are aligned.
摘要翻译：光纤插座在其一端侧具有玻璃棒状透镜，并且与接收器的相对端侧连接的光纤的前端与玻璃棒状透镜的球面物理接触，从而形成所述光纤与要设置在所述玻璃棒透镜侧的光学元件光学耦合，其中，包括用于将所述光纤的前端插入其中的套筒的壳体固定到透镜保持器，用于通过所述透镜保持器固定地保持所述玻璃棒透镜使得套筒的中心和玻璃棒状透镜的球面的中心对齐。

16. 发明授权

US5233580A Laser diode unit welded to a mounting member by laser light 失效
标题翻译：激光二极管单元通过激光焊接到安装构件
公开(公告)号：US5233580A
公开(公告)日：1993-08-03
申请号：US899935
申请日：1992-06-17
申请人： Haruo Tanaka , Naotaro Nakata
发明人： Haruo Tanaka , Naotaro Nakata
IPC分类号： G11B7/125 , H01L31/167 , H01L33/00 , H01S5/022
CPC分类号： G11B7/127 , H01L31/167 , H01L33/00 , H01S5/02248 , H01L2224/48091 , H01L2924/19107 , H01S5/0683
摘要： An optical pick-up is arranged to detect information recorded on an optical disk by causing laser light projected onto and reflected from a signal surface of the optical disk disposed within an optical system and the laser light is received by a light receiving element provided in the optical system. The optical pick-up is mounted with a laser diode unit which includes a metallic substrate, a laser diode, a photo-diode, a current feeding lead portion to the laser diode and a current output lead portion which forms the photo-diode, respectively disposed at one side face in the direction of thickness of the metallic substrate for emitting the laser light. The laser diode unit is positioned and fixed at a predetermined position of the optical system through a mounting member. The mounting of the laser diode unit includes setting the other side face in the direction of thickness of the substrate and the mounting member in a desired positional relation for contact with each other as a result, a plurality of contact places therebetween may be simultaneously welded by laser light for combining the laser diode unit and the optical pick-up into one unit.
摘要翻译：光学拾取器被布置成通过使投射到设置在光学系统内的光盘的信号表面上投影并从其反射的激光来检测记录在光盘上的信息，并且激光由设置在光学系统中的光接收元件接收光学系统。光学拾取器安装有激光二极管单元，该激光二极管单元包括金属基板，激光二极管，光电二极管，到激光二极管的馈电引线部分和形成光电二极管的电流输出引线部分设置在用于发射激光的金属基板的厚度方向的一个侧面。激光二极管单元通过安装构件定位并固定在光学系统的预定位置。激光二极管单元的安装包括将基板和安装构件的厚度方向的另一侧面设置为相互接触的所需位置关系，因此可以通过其间的多个接触位置同时焊接用于将激光二极管单元和光学拾取器组合成一个单元的激光。

17. 发明授权

US07388823B2 Optical pickup, manufacturing method thereof, and optical disk system 有权
标题翻译：光学拾取器，其制造方法和光盘系统
公开(公告)号：US07388823B2
公开(公告)日：2008-06-17
申请号：US10392074
申请日：2003-03-19
申请人： Naotaro Nakata
发明人： Naotaro Nakata
IPC分类号： G11B7/00
CPC分类号： G11B7/127 , G11B7/1365
摘要： An optical pickup for reading information written on an optical disk is equipped with a vertical multi-mode converted laser diode which emits light, means for focusing the emitted light from the laser diode onto the optical disk, and means for receiving reflected light from the optical disk in order to read the information written on the optical disk, wherein the coherent distance of the emitted light from the laser diode is made shorter than the optical path length of the optical pickup.
摘要翻译：用于读取写在光盘上的信息的光学拾取器配备有发射光的垂直多模转换激光二极管，用于将来自激光二极管的发射光聚焦到光盘上的装置，以及用于接收来自光学器件的反射光的装置磁盘，以便读取写在光盘上的信息，其中来自激光二极管的发射光的相干距离比光学拾取器的光程长度短。

18. 发明授权

US06212149B1 Modified light-receiving element in an optical pickup for reading optical discs 失效
标题翻译：用于读取光盘的光学拾取器中的修改的光接收元件
公开(公告)号：US06212149B1
公开(公告)日：2001-04-03
申请号：US09193766
申请日：1998-11-17
申请人： Naotaro Nakata , Takeshi Yamamoto
发明人： Naotaro Nakata , Takeshi Yamamoto
IPC分类号： G11B700
CPC分类号： G11B7/131 , G11B7/0901 , G11B7/0912 , G11B7/0916 , G11B7/094 , G11B7/133 , G11B7/1381 , G11B7/22
摘要： An optical pickup includes a photo-detector. The photo-detector is structured by light receiving elements on one of which a blind zone is formed. If a relationship between an output of the light receiving element formed with a blind zone and a lens position is displayed as a graph on a measurement signal output device, a point that a beam converges on the blind zone, i.e., a point that a spot size assumes a minimum, is displayed as an edge. In the photo-detector, a region for receiving a sub-beam on light shield side, i.e., one sub-beam having a grater spot size, has a width broader than a width of a region for receiving a sub-beam on an aperture side, i.e., another sub-beam smaller in spot size.
摘要翻译：光拾取器包括光检测器。光检测器由其中之一形成盲区的光接收元件构成。如果形成有盲区的受光元件的输出与透镜位置之间的关系在测量信号输出装置上作为曲线显示，则束会聚在盲区上的点，即点尺寸假定为最小，显示为边。在光检测器中，用于接收光屏蔽侧上的子光束的区域，即具有更大光点大小的一个子光束的宽度比用于接收孔径上的子光束的区域的宽度宽侧，即另一个光束尺寸较小的子光束。

19. 发明授权

US5689521A Semiconductor laser light source unit 失效
标题翻译：半导体激光光源单元
公开(公告)号：US5689521A
公开(公告)日：1997-11-18
申请号：US258706
申请日：1994-06-13
申请人： Naotaro Nakata
发明人： Naotaro Nakata
IPC分类号： F21K99/00 , F21S2/00 , F21V5/04 , F21Y111/00 , G02B3/06 , G02B6/42 , G02B27/09 , H01S3/00 , H01S5/00 , H01S5/02 , H01S5/022 , H01S5/40 , H01S3/19
CPC分类号： G02B19/0014 , F21S9/02 , F21V5/04 , F21V5/043 , G02B19/0052 , G02B27/09 , G02B27/0966 , G02B3/06 , G02B6/4204 , F21Y2101/00 , F21Y2115/30
摘要： A rod lens or a cylindrical lens is disposed in front of a semiconductor laser to increase a divergence angle of a laser beam emitted from the semiconductor laser so as to form a substantially circular far field pattern. In another constitution, there is disposed in front of a semiconductor laser a composite lens having two cylindrical surfaces whose cylindrical axes are perpendicular to each other. The cylindrical surface on the side of the semiconductor laser is a convex surface and the other cylindrical surface is a convex or concave surface. In still another constitution, two semiconductor lasers emitting the same optical signal are arranged adjacent each other so that respective light emitting portions of two pn junction planes are located in the same plane and perpendicular to each other, and that laser beams form orthogonal spots at a single predetermined position.
摘要翻译：棒状透镜或柱面透镜设置在半导体激光器的前面，以增加从半导体激光器发射的激光束的发散角度，从而形成大致圆形的远场图案。在另一种结构中，在半导体激光器的前方设置有具有圆柱形轴线彼此垂直的两个圆柱面的复合透镜。半导体激光器一侧的圆柱面是凸面，另一圆柱面是凸面或凹面。在另一种结构中，发射相同光信号的两个半导体激光器彼此相邻布置，使得两个pn结面的各个发光部分位于相同的平面中并且彼此垂直，并且激光束在单个预定位置。

20. 发明授权

US5661581A Optical communication unit 失效
标题翻译：光通信单元
公开(公告)号：US5661581A
公开(公告)日：1997-08-26
申请号：US542014
申请日：1995-10-12
申请人： Masato Mushiage , Naotaro Nakata , Yuta Tezen , Kenji Okada
发明人： Masato Mushiage , Naotaro Nakata , Yuta Tezen , Kenji Okada
IPC分类号： G02B6/42 , H04B10/00
CPC分类号： H04B10/40 , G02B6/4246
摘要： An optical communication unit includes a light emitting element for emitting a transmission signal light; a condenser lens for coupling the transmission signal light from the light emitting element to an optical transmission path; and a light receiving element for receiving a receiving signal light from the optical transmission path. A light emitting surface in the light emitting element is formed by a plane tilted to a perpendicular plane in a substrate surface of a chip in the light emitting element.
摘要翻译：光通信单元包括用于发射发射信号光的发光元件; 聚光透镜，用于将来自发光元件的透射信号光耦合到光传输路径; 以及用于接收来自光传输路径的接收信号光的光接收元件。发光元件中的发光表面由在发光元件中的芯片的衬底表面中的垂直平面倾斜的平面形成。

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